Bridge



Locomonvn EXHAUST PIPE.

.No. 567,122, v PatentedSept.8.118961:

WHESSICS ls PETERS nu. mom-um UNITED STATES PATENT GEEICE.

XVILLIAM E. BORBRIDGE, OF OTTAlVA, CANADA.

LOCOMOTIVE EXHAUST-PIPE.

SPECIFICATION forming part of Letters Patent No. 567,122, datedSeptember 8, 1896. Application filed A pril 21,1896l Serial No. 588,518.(No model.)

To all whom it may concern.-

Be it known that I, WILLIAM EDWARD Bon- BRIDGE, a citizen of theDominion of Canada, and a subject of the Queen of Great Britain,residingin the city of Ottawa, in the county of Carleton, in theProvince of Ontario, Canada, have invented certain new and usefulImprovements in Locomotive Exhaust-Pipes, of which the following is aspecification.

The objects of my invention are, first, to provide such improvementinthe directing of the exhaust and draft starting jet of steam inlocomotive-engines and the exhausted steam from the air-brake, improvethe draft of the furnace thereby, and to obviate to the uneven cuttingor wearing of the smoke-stack by sideward blasts of the steam-jets andair-pump exhaust by so diffusing this steam that it will be exhaustedcentrally in the smoke-stack. I attain these objects by means of thepeculiar arrangement and combination of the blower and exhaust pipes,which is illustrated in the accompanying drawings, in which Figure 1 isa sectional elevation of that part of the main exhaust-pipe of alocomotive-engine which embodies my invention. Fig. 2 is a plan view;Fig. 3, a sectional view of the exhaust-nozzle. Fig. i is a top or planview of the device without the nozzle, the interior pipe being shown insection; Fig. 5, a transverse section on line X X, Fig. 1; Fig. 6, asectional plan view on line Y Y. Fig. 7 shows the expanding ring, shownalso in place in Fig. 1.

In the present practice of the construction of locomotive-engines onwhich air-brakes are used both the blower, a small pipe for sendingsteam through the smoke-stack, and thus creating a draft when the engineis standing, and the exhaust from the air brake are placed separatelyand outside the main exhaust-pipe of the engine, which is always placeddirectly under the center of the smokestack, and therefore it followsthat the escaping steam from these smaller pipes strikes with greatforce against some one part of the wall of the smoke-stack, and itscontinual friction at this point soon cuts through the wall andnecessitates repairs. It will be seen that this difficulty is entirelyavoided by my arrangement of the pipes as herein shown, as

each of the three pipes is placed directly central under thesmoke-stack.

It will also be seen from what follows that a further and importantadvantage is presented by my invention, namely, that the exhaust-steamfrom the cylinders is directed to fill especially the space adjacent tothe wall of the smoke-stack, the center of the column being filled bythe exhaust-steam from the air-brake, thus insuring a perfect draft.

The main exhaust-pipe A is secured to the saddle of the engine-frameimmediately under the smoke-stack. A portion of this pipe from its baseupward is divided vertically by a central wall B, which keeps theexhaustblasts from the cylinders separate. A pipe 0 is cast central inthe pipe A, extending from above its top end (see Fig. 1) to a suitablepoint near its base, where it is turned outward, projecting through theside of the pipe A. The pipe 0 is for leading off the exhauststeam fromthe air-brake and is steadied in the pipe A by the Webs D, cast integralwith both these pipes, or, if preferred, the wall B may be continued tothe top of the pipe A. The blower-pipe E is for sending a jet of steaminto the smoke-stack. To create draft in the furnace when the engine isstanding, it is also cast integral with and centrally in the pipe 0,projecting outwardat its lower extremity through the walls of both pipesA and C. At or below the entrance of the pipes C and E to the pipe A thediameter of the latter is increased sufficiently to retain the samesectional area throughout its length.

In order to increase the draft, it is sometimes necessary to contractthe column of exhaust-steam before it enters the smoke-stack. This-isaccomplished by means of the exhaustnozzle plate F, which is secured tothe top of the pipe A, and has the inwardly-projecting lip Gr. vByunscrewing the expanding ring H the size of the opening for the passageof exhaust-steam through the nozzle-plate F is increased. Thus the saidring affords means for varying the strength of the blast.

It may be easily seen that by the above-described device there isprovided for locomotive-engines the greatest possible exemption fromuneven wearing of the parts and the most perfect draft for the furnace.

Vthat I do claim as my invention, and desire to secure by LettersPatent, is-

1. In a locomotive-engine, the herein-described arrangement of theblower, or draftstarting, and exhaust pipes, in which the exhaust-pipeof the air-brake is placed centrally in the main exhaust-pipe of thelocomotiveengine, and the blower or draft-starting steam pipe is placedcentrally in the exhaust-pipe of the air-brake, substantially as shownand described.

2. The combination in a locomotive-engine of the main exhaust -pipe,with the draftexhaust-pipe, substantially as herein shown and described.

Signed at Ottawa this 11th day of April, 20 1896.

WILLIAM E. BORBRID GE.

In presence of LOUIS J. COURSOLLES, N. A. BELCOUR'I'.

